The week after Mr. Trump met with the construction trades unions about infrastructure, his press secretary, Sean Spicer, told reportersbr that “the president believes in right to work,” which would allow workers to opt out of paying union dues or fees.br “It was a substantial meeting about good middle-class jobs,” said Terry O’Sullivan, general president of the Laborers’ International Union of North America, addingbr that Mr. Trump was the first president to invite him to the Oval Office.br “I would not be surprised if Steve Bannon and others would be overtlybr and covertly trying to divide the labor movement,” said Randi Weingarten, president of the American Federation of Teachers.